99-00 DIYPNP box. Thing to do before plugging it in? Megatune question?

I've acquired a PNP box that was built by diyautotune for a guy a few years ago. It supposedly still has his map loaded on it. I'm familiar with the things you have to do on the older cars to install MS, removing ECU fuse+ignitor plug etc.

Is there anything i need to do on the NB before i hit the key? Also I've always tuned with Megatune obviously i won't have a 99-00 option without MAF, but could i just choose a different option? Or do i HAVE to get tuner studio for this to work? The car will be dyno tuned from the get go.

Well finally was able to link to it, however anything above half throttle the a/f ratio would jump from 18.0 to 10.0s back and forth...100 rpm at a time. Ran out of patience tonight, im sure its a setting.

I tried turning off the o2 sensor, unplugging the maf, hooked the MS vacuum line to another port under the VICS. Same thing happened. 1/4 throttle the car pulled smooth and consistent :shrug: